iscaminvbinom(alpha = 0.05, n = 30, prob = 0.5, lower.tail = TRUE)
iscaminvbinom(alpha = 0.05, n = 30, prob = 0.5, lower.tail = FALSE)
iscaminvbinom(alpha = 0.01, n = 60, prob = 0.10, lower.tail = FALSE)
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